Geneva: The UN humanitarian adviser for Syria called on Wednesday for access to the eastern Ghouta town of Douma, where he said some 80,000-150,000 civilians were "on their knees" after years of siege and fighting.
Also, SANA reported that fighters alligned with another rebel group, Faylaq al-Rahman, left Douma in buses sent by the Syrian government on Sunday.
The Central Military Media outlet, which is linked to the Syrian military, says the Army of Islam has agreed to leave the town of besieged town of Douma for Jarablus, a town shared between rebel and Turkish control in north Syria.
More than 45,000 rebels and their families have been evacuated from eastern Ghouta since March 22 to be relocated in Idlib, according to Syrian authorities. The source said on Tuesday the government had set a deadline for militants to leave Douma, without saying how long. There was no comment from the Army of Islam.
In April 2017, under a deal sponsored by regime ally Iran and rebel backer Qatar, almost 11,000 people leave four besieged areas.
Jaish Al Islam, which has been defending the eastern Ghouta town of Douma against a ferocious onslaught by Russian-backed Syrian government forces, has not confirmed the agreement with the government.
Monday s evacuation came after more than 46,000 people - including fighters from other areas of Eastern Ghouta - left on buses to the northwestern province of Idlib, the last in Syria to remain largely outside regime control. The security services responded by putting the town and other suburbs around Damascus under siege, bombing hospitals and residential areas, and blocking food and medical relief.
The town of Douma was one of the earliest hubs of the uprising against President Bashar Assad in 2011 and home to the Army of Islam, the largest rebel group in the eastern Ghouta suburbs of the Syrian capital.
Al Jazeera's Osama Bin Javaid, reporting from Ankara, said that after the meeting the three leaders expressed their increasing hope for peaceful solution in the Syrian crisis in light of the achievements produced by their trilateral dialogue. Around 1,300 fighters, activists, and civilians signed up for evacuation, according to the Observatory.
On Wednesday, the leaders of Russian Federation, fellow regime supporter Iran and rebel-backer Turkey are to meet for a summit devoted to Syria.
Elsewhere in Syria, Russian and Syrian military officers told rebels in Eastern Qalamoun, about 25 miles northeast of Damascus, they must accept regime rule or leave.